ClassID:

146145

F15B20/002 - CPC Classification

Classification description:

Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems Electrical failure

Recent Application in this class:
#1
20250327467
2025-10-23

Hydraulic Cylinder Assembly and Method for Operating a Hydraulic Cylinder Assembly

#2
20250277542
2025-09-04

ACTUATOR ASSEMBLY AND METHOD OF USE

#3
20250129807
2025-04-24

PARALLEL ELECTROHYDRAULIC SERVO VALVE CONTROLLED ACTUATOR WITH FAILURE ACCOMMODATION

#4
20250084875
2025-03-13

DUAL ELECTRICAL POWER SUPPLIES FOR A HYDRAULIC ACTUATOR SYSTEM

#5
20240369083
2024-11-07

Hydraulic system with a functional safety feature for demolition robots

#6
20240034601
2024-02-01

EMERGENCY-OPERATION VALVE BLOCK FOR A MOBILE CRANE

#7
20230095438
2023-03-30

AUTOMOTIVE HYDRAULIC SYSTEM SMART MONITOR AND SAFETY SYSTEMS AND DEVICES

#8
20230035122
2023-02-02

Power units with manual override controls for hydraulic systems

#9
20220403860
2022-12-22

Electrohydraulic system for a valve

#10
20220290698
2022-09-15

Waterproof solenoid valve

#11
20220145770
2022-05-12

Electrohydrostatic actution system, hydraulic circuit of electrohydrostatic actution system, and steam turbine system including same

#12
20220081103
2022-03-17

Failsafe valve for geared rotary actuator

#13
20220003253
2022-01-06

Power units with manual override controls for hydraulic systems

#14
20210317851
2021-10-14

Electrohydraulic poppet valve device control that maintains the last commanded position of a device upon power interruption and provides back-up position control

#15
20210277920
2021-09-09

System that maintains the last commanded position of device controlled by a two-stage, four-way electrohydraulic servo valve upon power interruption

#16
20210190205
2021-06-24

Automatic transmission park control system

#17
20200362890
2020-11-19

Power units with manual override controls for hydraulic systems

#18
20200309166
2020-10-01

Hydraulic system and emergency operation method

#19
20200292100
2020-09-17

Spool valve device and spool valve

#20
20200256479
2020-08-13

Steam valve driving apparatus

#21
20200255126
2020-08-13

Actuator control valve arrangement

#22
20200130852
2020-04-30

EMERGENCY MANUAL PARACHUTE OPERATION SYSTEM

#23
20200096015
2020-03-26

Apparatus for controlling a hydraulic machine

#24
20200049169
2020-02-13

Waterproof manifold electromagnetic valve

#25
20200003238
2020-01-02

Power units with manual override controls for hydraulic systems

#26
20190308719
2019-10-10

Distributed trailing edge wing flap systems

#27
20190264714
2019-08-29

ELECTRO-HYDRAULIC VALVE ACTUATOR HAVING MODULAR MANIFOLD WITH CONFIGURABLE REDUNDANCY

#28
20190257328
2019-08-22

Electro-hydraulic control system with fail-safe pilot valves

#29
20190085876
2019-03-21

Hydraulic system

#30
20190017501
2019-01-17

Electro hydrostatic actuator

#31
20180320715
2018-11-08

Fail-fixed hydraulic actuator

#32
20180266607
2018-09-20

Joint device

#33
20180155044
2018-06-07

Method and apparatus for operating a power system architecture

#34
20180148074
2018-05-31

ACTUATOR CONTROL DEVICE AND ACTUATOR UNIT

#35
20180094746
2018-04-05

Methods and apparatus for automatically detecting the failure configuration of a pneumatic actuator

#36
20180073198
2018-03-15

Electric-hydraulic railway switch device for moving railroad switch points

#37
20180066416
2018-03-08

Hydraulic Drive System for work machine

#38
20180023725
2018-01-25

No-bolt security latching system

#39
20170356475
2017-12-14

VENTILINSEL-BASISMODUL UND VENTILINSEL

#40
20170252912
2017-09-07

Hydrodynamic compression or cutting tool

#41
20170002845
2017-01-05

Electro hydrostatic actuators

#42
20170002844
2017-01-05

Electro hydrostatic actuators

#43
20160333899
2016-11-17

Fluid pressure system

#44
20160305093
2016-10-20

Work machine

#45
20160153475
2016-06-02

Discrete pilot stage valve arrangement with fail freeze mode

#46
20150377264
2015-12-31

Hydraulic system for construction machinery

#47
20150354604
2015-12-10

Hydraulic adjusting device

#48
20150274281
2015-10-01

Pneumatic positioning system

#49
20150259047
2015-09-17

Closed-loop control system for controlling a device

#50
20150152887
2015-06-04

Fail-safe actuation system

#51
20140060667
2014-03-06

Compressed air supply device for commercial vehicles

#52
20140026969
2014-01-30

Fail-safe actuation system

#53
20130312403
2013-11-28

Hydraulic system for construction machine having electronic hydraulic pump

#54
20130239797
2013-09-19

Hydraulic cylinder system

#55
20130014499
2013-01-17

Methods for safe operation of hydraulic hybrid vehicles with over-center pump/motors

#56
20120055329
2012-03-08

Actuator device having an open/close valve

#57
20110284083
2011-11-24

Fail-freeze device for positioner

#58
20110083750
2011-04-14

Method for operating a hydraulic actuation power system experiencing pressure sensor faults

#59
20110047723
2011-03-03

CLOSED-LOOP CONTROL SYSTEM FOR CONTROLLING A DEVICE

#60
20100251705
2010-10-07

Control of a fluid circuit using an estimated sensor value

#61
20100100274
2010-04-22

Safety device for hydraulic working machine

#62
20100037957
2010-02-18

Method and device for the activation of an electropneumatic valve of a pressure medium-actuated position controller

#63
20090279222
2009-11-12

Hydraulic valve control circuit and method for checking the function of a hydraulic valve control circuit

#64
20090278066
2009-11-12

HYDRAULIC VALVE CONTROL DEVICE AND METHOD FOR CHECKING A HYDRAULIC VALVE CONTROL DEVICE

#65
20080230127
2008-09-25

Actuator position control device using a fail freeze servo-valve

#66
20080184876
2008-08-07

Hydraulic actuator having an auxiliary valve

#67
20080184875
2008-08-07

Valve assembly and a hydraulic actuator comprising the valve assembly

#68
20080184874
2008-08-07

Hydraulic actuator for a servomotor with an end lock function

#69
20070277670
2007-12-06

Maintaining the position of an electro-hydraulic servo valve controlled device upon loss of position command

#70
20070151235
2007-07-05

Actuator system having a valve manifold

#71
20070044651
2007-03-01

Valve arrangement for the activation of a structural element

#72
20070023093
2007-02-01

Latchable electrohydraulic servovalve

#73
20060049688
2006-03-09

Device for the emergency lowering of a load-carrying means for a stacker truck

#74
20050146115
2005-07-07

Control system and a vehicle comprising the control system

#75
17652137
2023-05-23

Rotary servo for fixed fail actuators